EP 0038634 A3 19811223 - VINYL CHLORIDE MICROSUSPENSION POLYMERISATION PROCESS

Title (en)

VINYL CHLORIDE MICROSUSPENSION POLYMERISATION PROCESS

Publication

EP 0038634 A3 19811223 (EN)

Application

EP 81301394 A 19810331

Priority

GB 8013097 A 19800421

Abstract (en)

[origin: EP0038634A2] Vinyl chloride polymerisation in aqueous microsuspension in which the free-radical forming initiator is activated with a monomer-soluble metallic complex which is progressively introduced or progressively produced in-situ throughout the polymerisation so as to maintain a substantially constant reaction rate, the metallic complex being formed by the reaction between a water-soluble metal salt (preferably cupric sulphate) and a complexing agent (preferably ascorbic acid) - the complexing agent causing the metal to change from its water soluble form to a monomer-soluble form- wherein the homogenisation conditions are selected to yield a polymer latex having a particle size distribution defined by having a width at half height of the differential weight distribution (V1/2 ) within the range 0.50 to 1.80 mu m, typical ranges being 0.50 to 0.80 mu and 0.9 to 1.80 mu m.

IPC 1-7

C08F 14/06; C08F 2/18

IPC 8 full level

C08F 14/00 (2006.01); C08F 2/00 (2006.01); C08F 2/18 (2006.01); C08F 2/22 (2006.01); C08F 2/24 (2006.01); C08F 4/00 (2006.01); C08F 4/28 (2006.01); C08F 14/06 (2006.01)

CPC (source: EP)

C08F 14/06 (2013.01)

Citation (search report)

[A] DE 2125586 A1 19721214 - HUELS CHEMISCHE WERKE AG
[D] GB 1435425 A 19760512 - RHONE PROGIL

Designated contracting state (EPC)

AT BE CH DE FR GB IT LI NL SE

DOCDB simple family (publication)

EP 0038634 A2 19811028; EP 0038634 A3 19811223; EP 0038634 B1 19840912; AT E9357 T1 19840915; AU 6932681 A 19811029; CA 1214300 A 19861118; DE 3165931 D1 19841018; ES 501518 A0 19820216; ES 8202839 A1 19820216; JP S5728113 A 19820215; JP S6364441 B2 19881212; NZ 196743 A 19830614

DOCDB simple family (application)

EP 81301394 A 19810331; AT 81301394 T 19810331; AU 6932681 A 19810409; CA 375719 A 19810416; DE 3165931 T 19810331; ES 501518 A 19810421; JP 6052781 A 19810421; NZ 19674381 A 19810406